274 



ARMATURE CONSTRUCTION 



A large machine actually employed for such work is shown in 



Fig. 325. After bending, 

 the strip has the form 

 indicated in Fig. 326. 

 A bundle of four such 

 strips (consisting of the 

 four conductors which go 

 to make up the half con- 

 tents of a slot) are next 

 placed on a form of the 

 type shown in Fig. 327, 

 and by the means there 

 indicated are bent into 

 the required shape. 



This form consists of 

 a base with its upper 

 surface curved to the 

 radius of the armature 

 at the bottom of the 

 slots. From the surface 

 project ribs (shown 

 screwed on) which form 

 a contour of the shape 

 which the coil is required 

 to have. The two sides of 

 the strip are first opened 

 apart at an angle and 

 placed on the form at the 

 front end, and secured by 

 the screw shown in the 

 lower view. 



Commencing now 

 with the right-hand side 

 of the strip, it is bent to 

 shape on the surface of 

 the form following the 

 contour of the projecting 

 ribs, and securely clamped 

 on to them from point to 

 point by the clamps 

 marked A. 



These clamps are of 



